Synthetic refers to a man-made material with a natural counterpart that shares the same (or nearly identical) chemical, optical, and physical properties. Synthetic ruby may be created in a laboratory process that involves coating a natural corundum seed with feed material. During the process, a layer by layer grown occurs on the seed crystal.

Colors

Orangy Red, Red, Purplish Red

Synthetic-ruby-overgrowth-on-natural-corundum-seed classification

CommonName

Synthetic Ruby Overgrowth On Natural Corundum Seed

Species

Corundum

Variety

Synthetic Ruby Overgrowth On Natural Corundum Seed

Colors

Orangy Red, Red, Purplish Red

AlternateNames

GemstoneGroups

KeySeparations

magnification with immersion and RI, birefringence

ClassificationComments

Stones will have OTL RI where the chromium rich overgrowth layer remains.

Color on these stones is strong table up but patchy on the pavilion when viewed on a white piece of paper. The stones have wavy growth that can appear step like or crystalline. One might be able to see facet junctions of the original stone underneath the overgrowth layer that do not match the facets of the outer layer. Stones will probably show uneven color due to removal or the overgrowth layer. They have a mottled or roiled texture when stone is viewed with immersion.